Log in
Register
Menu
Log in
Register
Home
What's new
Latest activity
Authors
Forums
New posts
Search forums
What's new
New posts
Latest activity
Members
Current visitors
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Miscellaneous Sections
Tech Head - The Technology Section
Raspberry Pi
Allo DigiOne & Volumio
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Archive-8" data-source="post: 1033724"><p>I decided to buy an Allo DigiOne Dac a few days ago, it’s one of the more pricey cards.</p><p></p><p>So far it was definitely a good upgrade <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" /></p><p></p><p>Allo’s spec</p><p></p><p><strong>We started designing a digital (S/PDIF) transport for RPI with one goal in mind: Absolut best S/PDIF output.</strong></p><p></p><p>Now let me explain… behind the grandiose wording there is an exact science. Since this is a digital stream the most important aspect for "absolut best" is jitter. Jitter in digital domain directly translates into analog errors. Second, is noise. Lowering the noise that’s injected in your DAC will produce some (small-to-none) improvements.</p><p></p><p><strong>Then we went to work.</strong></p><p></p><p>10 LDOs, 12 LPF, DC/DC convertors, galvanic isolator, WM8805, flip flops, buffers, NDK oscillators.</p><p></p><p>Optical had to go… by definition it has a jitter of 4ns. That’s 4000ps. We simply removed it. However, optical has galvanic isolation so we took the decision to use a digital isolator instead that separates the outputs from both RPI and WM8805.</p><p></p><p>DigiOne has 2 outputs: BNC and plain RCA (coaxial). On both, we have achieved jitter of 0.6ps (1 picosecond – time taken by light in a vacuum to travel approximately 0.30 mm).</p><p></p><p>Noise. 50uV (batteries have about 12uV of noise).</p><p></p><p>[ATTACH=full]112486[/ATTACH]</p><p></p><p>[ATTACH=full]112480[/ATTACH] [ATTACH=full]112481[/ATTACH] [ATTACH=full]112482[/ATTACH] [ATTACH=full]112483[/ATTACH]</p><p></p><p>Dac mounted.</p><p></p><p>[ATTACH=full]112484[/ATTACH] [ATTACH=full]112485[/ATTACH]</p><p></p><p>After a lot of stress I found all I had to do was switch from my old RuneAudio img to volumio.</p><p></p><p>Volumio is simply flashed to the micro sd card and configured via the web interface (when it’s booted)</p><p></p><p>Once you are at the web interface via the address Volumio.local</p><p></p><p>Click the little gear wheel to bring up the menu, and select the playback options.</p><p></p><p>Just don’t forget to hit save when you are done.</p><p></p><p>The Nas was even easier to setup as the first run wizard sorted that out for me.</p><p></p><p>Pi up and running.</p><p></p><p>[ATTACH=full]112490[/ATTACH]</p><p>[ATTACH=full]112491[/ATTACH]</p><p>[ATTACH=full]112492[/ATTACH]</p></blockquote><p></p>
[QUOTE="Archive-8, post: 1033724"] I decided to buy an Allo DigiOne Dac a few days ago, it’s one of the more pricey cards. So far it was definitely a good upgrade :D Allo’s spec [B]We started designing a digital (S/PDIF) transport for RPI with one goal in mind: Absolut best S/PDIF output.[/B] Now let me explain… behind the grandiose wording there is an exact science. Since this is a digital stream the most important aspect for "absolut best" is jitter. Jitter in digital domain directly translates into analog errors. Second, is noise. Lowering the noise that’s injected in your DAC will produce some (small-to-none) improvements. [B]Then we went to work.[/B] 10 LDOs, 12 LPF, DC/DC convertors, galvanic isolator, WM8805, flip flops, buffers, NDK oscillators. Optical had to go… by definition it has a jitter of 4ns. That’s 4000ps. We simply removed it. However, optical has galvanic isolation so we took the decision to use a digital isolator instead that separates the outputs from both RPI and WM8805. DigiOne has 2 outputs: BNC and plain RCA (coaxial). On both, we have achieved jitter of 0.6ps (1 picosecond – time taken by light in a vacuum to travel approximately 0.30 mm). Noise. 50uV (batteries have about 12uV of noise). [ATTACH=full]112486[/ATTACH] [ATTACH=full]112480[/ATTACH] [ATTACH=full]112481[/ATTACH] [ATTACH=full]112482[/ATTACH] [ATTACH=full]112483[/ATTACH] Dac mounted. [ATTACH=full]112484[/ATTACH] [ATTACH=full]112485[/ATTACH] After a lot of stress I found all I had to do was switch from my old RuneAudio img to volumio. Volumio is simply flashed to the micro sd card and configured via the web interface (when it’s booted) Once you are at the web interface via the address Volumio.local Click the little gear wheel to bring up the menu, and select the playback options. Just don’t forget to hit save when you are done. The Nas was even easier to setup as the first run wizard sorted that out for me. Pi up and running. [ATTACH=full]112490[/ATTACH] [ATTACH=full]112491[/ATTACH] [ATTACH=full]112492[/ATTACH] [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Miscellaneous Sections
Tech Head - The Technology Section
Raspberry Pi
Allo DigiOne & Volumio
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more…
Top